On the deep minimum in proton-induced deuteron breakup

R. van Dantzig, G.J.F. Blommestijn, R. Moddemeijer and I. Slaus

Nationaal Instituut voor Kernfysica en Hoge-Energiefysica (NIKHEF), sectie K,
P.O. Box 4395, NL-1009 AJ Amsterdam, The Metherlands,

present addres

University of Groningen, Department of Computing Science,
P.O. Box 800, NL-9700 AV Groningen, The Netherlands,
phone: +31.50.363 3940 - fax: +31.50.363 38005 - e-mail: rudy@cs.rug.nl

Abstract

We have studied the so-called "deep minimum" in the reaction p+d -> p+p+n at E = 50 MeV, both experimentally, using out data obtained with the BOL multidetector array, and theoretically on the basis of Faddeev calculations by Kloet and Tjon and Stolk and Tjon, using S-wave local potentials and the full Reid soft-core potential. From our studies it seems to emerge that the deep minimum, in fact one of the most salient features of the 4-dimensional breakup cross section, can be described as essentially complete destructive inteference between p-p and p-n S-wave quasi free scattering (for p-p spin singlet). The position of the minimum in the final state phase space is expected to be sensitive to the elastic scattering phase-shifts which at 50 MeV essentially determine the quasi-free scattering. We find that the position of the minimum as found for different potentials provides an indication of their validity indead in predicting the phase shifts correctly. Several new ways of studying the interference phenomena more in detail, both experimentally and theoretically, are suggested by our work.

Published

Proceedings of the International Conference on Nuclear Structure, Aug. 30 - Sept. 3, 1982, Amsterdam, The Netherlands, p. 17, abstract , BibTeX .
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